Been using http://www.mytubio.com/ for my tube mix parties.. I'll try this service, It would be great if there was a way to ensure videos are from VEVO and not a user submitted video that simply displays the lyrics.
Well the idea is that we have an algorithm that tries to select the best video in terms of quality. It's a natural consequence that we often select vevo videos, but we don't have a bias towards them, if there's a more suitable video available that is just lyrics we'll select that.